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Use of a Putty as Gap Filler in Open-wedge Osteotomy

NCT05992038 · Status: RECRUITING · Phase: NA · Type: INTERVENTIONAL · Enrollment: 40

Last updated 2026-04-29

No results posted yet for this study

Summary

Rationale: Realignment osteotomies around the knee are a proven surgical treatment for unicompartmental knee osteoarthritis and a malalignment. Osteotomies can be very painful in the early postoperative phase. This is probably due to a combination of bony cut (bone pain) and postoperative hematoma (bleeding and leakage of the bone marrow) in the surrounding soft tissue. The AttraX® Putty can be used as a gap filler in open wedge osteotomies to potentially reduce postoperative pain by reducing the bleeding from the bone gap.

Objective: The main aim of this study is to determine whether early postoperative pain is decreased when the osteotomy gap is filled with AttraX® Putty, compared to conventional open wedge osteotomy without filling the gap. The secondary aims are faster accelerated rehabilitation/regaining function, reduction of local blood loss, accelerated bone union, comparable surgical accuracy, and the occurrence of (serious) adverse events.

Study design: Single-blinded, prospective, randomized controlled trial.

Study population: Adult patients qualifying for open-wedge tibial, open-wedge femur or double level osteotomy.

Intervention: According to a randomization scheme, the osteotomy gap will be filled with either the synthetic ceramic material AttraX® Putty or without a gap filler (conventional method).

Main study parameters/endpoints: The main study endpoint is the Numeric Rating Scale (NRS) pain during the first week postoperative. The secondary study endpoints are faster rehabilitation/regaining function, reduction of local blood loss, accelerated bone union, comparable surgical accuracy, and (serious) adverse events.

Nature and extent of the burden and risks associated with participation, benefit and group relatedness: Patients may have the advantage of experiencing less pain postoperatively if they are treated with the AttraX® Putty, which can contribute to a faster rehabilitation. Risks to the AttraX® Putty group may include an allergic reaction, failure to promote bone fusion and excessive bone growth. However, the preclinical studies and clinical studies show that the use of AttraX® Putty is safe for use in humans.

Conditions

  • Osteo Arthritis Knee

Interventions

PROCEDURE

Osteotomy with putty

Synthetic ceramic putty

PROCEDURE

Conventional osteotomy

conventional osteotomy

Sponsors & Collaborators

  • UMC Utrecht

    lead OTHER

Principal Investigators

  • R.J.H. Custers, Dr · UMC Utrecht

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2023-09-20
Primary Completion
2026-09-01
Completion
2026-12-01

Countries

  • Netherlands

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT05992038 on ClinicalTrials.gov